Boston Beer - The beer company raised its 2012 full-year earnings to between $4.30 a share and $4.60 a share, above Wall Street expectations for $4.21 a share. In addition, the company raised its 2013 sales guidance. Shares rallied in extended-hours trading.

Endo Health Solutions - The pharmaceutical company announced that its CEO David Holveck will retire in 2013. Separately, the company said it now anticipates 2012 earnings to be at the low end of its previous guidance range of between $5 a share and $5.10 a share. In addition, the firm said it no longer expects to achieve its previous 2013 revenue guidance of between $3 billion and $3.2 billion. Shares tumbled in extended-hours trading.

Legg Mason - The investment management company accelerated its dividend payment of 11 cents a share to December from January.

Agnico-Eagle Mines - The Canadian gold producer increased its quarterly dividend by 10 percent to 22 cents a share from 20 cents a share.

Cerner- The healthcare IT company announced a $170 million stock buyback program, sending shares higher in extended-hours trading.

IPG Photonics - The manufacturer of fiber lasers and fiber amplifiers declared a special dividend of 65 cents a share.

Weight Watchers - The dieting products and services company named James Chambers as its new COO effective January 4.

CA Technologies - The software company announced its CEO William McCracken will step down and will be succeeded by Michael Gregoire. McCracken will also leave the company's board. Shares edged higher in extended-hours trading.